<template>
  <h4>当前求和为:{{sum}}</h4>
  <button @click="sum++">点我++</button>
  <hr>
  <h2>姓名:{{name}}</h2>
  <h2>年龄:{{age}}</h2>
  <h2>薪资:{{job.j1.salary}}k</h2>
  <h3 v-show="person.car">座驾信息:{{person.car}}</h3>
  <button @click="name+='~'">修改姓名</button>
  <button @click="age++">增长年龄</button>
  <button @click="job.j1.salary++">增长薪资</button>
  <button @click="showRawPerson">输出最原始的person</button>
  <button @click="addCar">添加一台车</button>
  <button @click="person.car.name+='!'">换车名</button>
  <button @click="changePrice">换价格</button>
</template>

<script>
import { ref,reactive,toRefs,readonly,shallowReadonly,toRaw,markRaw } from "vue";
export default {
  name: 'Demo',
  setup() {
    //数据
    let sum = ref(0)
    let person = reactive({
      name:'张三',
      age:18,
      job:{
        j1:{
          salary:20
          }
      }
    })
    
    function showRawPerson(){
      const p = toRaw(person)
      p.age++
      console.log(p);
    }
    
    function addCar(){
      let car = {name:'奔驰',price:40}
      person.car = markRaw(car)
    }

    function changePrice(){
      person.car.price++
      console.log(person.car.price);
    }
    //返回一个对象（常用）
    return {
      sum,
      person,
      ...toRefs(person),
      showRawPerson,
      addCar,
      changePrice
    };
  },
};
</script>